These things happen phrase informal
Lisa: I’m sorry about losing your book. Rose: No problem! These things happen.
Jennie: I know that you’re very sad about your breakup. Lana: It hurts but these things happen
Son: Mom, I’m sorry about breaking your expensive vase. Mom: Never mind. These things happen.
Don't make plans that depend on something hoped before it has actually happened.
Don't make sure that the result will be good until it actually happens.
If someone is fucked by the fickle finger of fate, they have gone through an unlucky situation.
No value, use, or purpose
1. Having got an unlucky outcome
2. In a hopeless situation
If someone has a cast iron stomach, they have a strong stomach that can digest unusual food and even bad food without being ill.
Jimmy must have a cast-iron stomach, when he drank milk with lime juice and felt perfectly fine afterward.